Summary of Significant Accounting Policies - Additional Information (Details)		12 Months Ended
	Apr. 01, 2020 USD ($)	Mar. 31, 2020 USD ($) segment shares	Mar. 31, 2019 USD ($) segment shares	Mar. 31, 2018 USD ($) shares
Accounting Policies [Line Items]
Number of operating segments | segment		1	1
Maturity of time deposits		90 days
Cash, uninsured amount		$ 137,319,000
Cash, FDIC insured amount		250,000
Cash and cash equivalents		138,012,000	$ 33,079,000
Depreciation		8,172,000	10,298,000	$ 10,498,000
Advertising costs		6,044,000	$ 8,226,000	$ 9,073,000
Operating lease right-of-use assets		31,004,000
Operating lease liabilities		49,442,000
Long-term operating lease liabilities		$ 38,823,000
ASC 842
Accounting Policies [Line Items]
Operating lease right-of-use assets	$ 38,784,000,000
Operating lease liabilities	8,873,000,000
Long-term operating lease liabilities	42,114,000,000
Reduction to other current liabilities	(2,342,000,000)
Reduction to other noncurrent liabilities	(9,861,000,000)
Cumulative-effect adjustment to retained earnings	$ 0
Employee Stock Options
Accounting Policies [Line Items]
Options excluded from the computation of diluted net income per share | shares		1,807	1,963	2,984
Minimum
Accounting Policies [Line Items]
Amortization period of intangible assets		5 years
Maximum
Accounting Policies [Line Items]
Amortization period of intangible assets		10 years
Computer Equipment | Minimum
Accounting Policies [Line Items]
Useful life		3 years
Computer Equipment | Maximum
Accounting Policies [Line Items]
Useful life		5 years
Furniture and Fixtures | Minimum
Accounting Policies [Line Items]
Useful life		3 years
Furniture and Fixtures | Maximum
Accounting Policies [Line Items]
Useful life		7 years
Leasehold Improvements
Accounting Policies [Line Items]
Furniture's and fixtures useful life lesser of lease term		lesser of lease term or estimated useful life of asset
Capitalized Software Costs
Accounting Policies [Line Items]
Useful life		3 years